EP1712355B1 - Printing unit of a rotary printing machine - Google Patents

Printing unit of a rotary printing machine Download PDF

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Publication number
EP1712355B1
EP1712355B1 EP06007161A EP06007161A EP1712355B1 EP 1712355 B1 EP1712355 B1 EP 1712355B1 EP 06007161 A EP06007161 A EP 06007161A EP 06007161 A EP06007161 A EP 06007161A EP 1712355 B1 EP1712355 B1 EP 1712355B1
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EP
European Patent Office
Prior art keywords
printing
cylinder
forme
images
cylinders
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06007161A
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German (de)
French (fr)
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EP1712355B2 (en
EP1712355A1 (en
Inventor
Norbert Dr. Dylla
Rainer Burger
Stefan Albrecht
Helmut Stuhlmiller
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Manroland Web Systems GmbH
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Manroland AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/16—Registering devices with means for displacing the printing formes on the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/10—Attaching several printing plates on one cylinder
    • B41P2227/11—Attaching several printing plates on one cylinder in axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/10—Attaching several printing plates on one cylinder
    • B41P2227/12—Attaching several printing plates on one cylinder in circumferential direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to a printing unit of a web-fed rotary printing press according to the preamble of claim 1.
  • Printing units of web-fed rotary printing presses have a plurality of printing units, each printing unit consisting of a transfer cylinder, a forme cylinder and an inking unit and optionally a dampening unit.
  • the form cylinder are also referred to as a plate cylinder and the transfer cylinder as a rubber cylinder.
  • printing units can have impression cylinders, wherein an impression cylinder can interact with one or more transfer cylinders of different printing units.
  • the transfer cylinders are also referred to as satellite cylinders.
  • printing units are also known which do not have counter-pressure cylinders, with such printing units without counterpressure cylinders unrolling the transfer cylinders of two printing couples.
  • a web-fed rotary printing unit having a plurality of printing units accordingly comprises a plurality of forme cylinders and a plurality of transfer cylinders and optionally one or more impression cylinders.
  • the present invention relates to printing units having a plurality of forme cylinder, a plurality of transfer cylinders and at least one impression cylinder.
  • Such printing units are also referred to as satellite printing units.
  • Satellite printing units of web-fed rotary printing presses usually have four printing units and therefore four forme cylinders and four transfer cylinders and one or two impression cylinders.
  • Such satellite printing units with four printing units and a counter-pressure cylinder are referred to as 9-cylinder printing units;
  • Printing units with four printing units and two counter-pressure cylinders, however, are referred to as 10-cylinder printing units.
  • partial printing images are preferably applied in the region of each printing unit for preferably a plurality of printed pages in one printing ink to a printing material moved between the transfer cylinders and the or each impression cylinder.
  • a pressure must be applied in a so-called pressure-on position of the printing unit on the one hand between the cylinders and the transfer cylinders of the printing units and on the other hand between the transfer cylinders and the respective impression cylinder, said pressing by pivoting or hiring the transfer cylinder to the respective form cylinder and provided to the respective impression cylinder.
  • the transfer cylinders are usually mounted eccentrically and positioned relative to the respective forme cylinder and impression cylinder such that a center of the transfer cylinder is not located on a connecting line between centers of the corresponding forme cylinder and impression cylinder. Rather, a connecting line of a center of a transfer cylinder with the center of the corresponding counter-pressure cylinder with the line connecting the centers of the corresponding forme cylinder and counter-pressure cylinder forms an angle between 5 ° and 40 °.
  • the transfer cylinder, the form cylinder and the or each impression cylinder such pressure units are subject to a deflection due to their own weight and due to the pressure or contact forces. This deflection depends in particular on the shape of the cylinder, with relatively slender cylinder undergo a greater deflection.
  • a clear circumferential register deviation can occur between the partial printing images to be printed in the different printing units of the printing unit, which adversely affects the print quality.
  • these circumferential register deviations are particularly pronounced when relatively slender cylinders are present.
  • the ratio of printed pages or printed images positioned axially one behind the other in the circumferential direction is large, for example in the case of 6/2 cylinders, in which six printed pages or printed images are arranged next to each other and in the circumferential direction in the axial direction two printed pages or printed images is positioned one behind the other.
  • 6/2 cylinders in which six printed pages or printed images are arranged next to each other and in the circumferential direction in the axial direction two printed pages or printed images is positioned one behind the other.
  • 3/1 cylinder, 4/1 cylinder or 6/1 cylinder A conventional printing unit is in EP-A-1314559 disclosed.
  • the present invention is based on the problem to provide a novel printing unit of a web-fed rotary printing press with minimized circumferential register deviations.
  • each form cylinder of each printing unit carries at least one printing form, such that each form cylinder in the axial direction next to each other several print images are applied over the corresponding partial printing images on the substrate, the number of axially juxtaposed images of the number of axially next to each other to be printed on the substrate Corresponds to printed pages, and wherein in the region of at least one forme cylinder in the axial direction of the respective form cylinder juxtaposed printed images are offset in the circumferential direction to each other such that circumferential register deviations between the to be printed in different printing units partial printing images are compensated.
  • Fig. 1 shows a printing unit 10 of a web-fed rotary printing press, wherein the printing unit 10 four printing units 11, 12, 13 and 14 and therefore four forme cylinders 15, 16, 17 and 18 and four transfer cylinders 19, 20, 21 and 22 includes.
  • the printing units 11 to 14 have not shown inking units and optionally dampening units.
  • the printing unit of Fig. 1 is therefore designed as a so-called 9-cylinder printing unit.
  • At least one printing plate is positioned on each of the forme cylinders 15 to 18, such that each forme cylinder 15 to 18 carries several print images next to one another in the axial direction and optionally in circumferential direction to apply corresponding partial print images to a printing substrate 24, the number of axially juxtaposed print images the number of axially juxtaposed on the substrate 24 to be printed pages corresponds.
  • the web-shaped printing substrate 24 is therefore printed in the region of each printing unit 11 to 14 with partial printing images in a printing ink for a plurality of axially juxtaposed and possibly circumferentially successively arranged print pages, according to Fig. 1 the printing material 24 for this purpose is moved between the transfer cylinders 19 to 22 and the impression cylinder 23.
  • First partial printed images are applied to the printing substrate 24 in the area of the printing unit 11, and further partial printed images are successively printed on the printing substrate 24 in the printing units 12, 13 and 14.
  • circumferential register displacements between the partial print images to be printed in the different printing units must be minimized so that the partial print images are printed on the printing substrate 24 in exact coverage.
  • the curve 25 corresponds to the curvature of a printed in the printing unit 11 of the forme cylinder 15 and the transfer cylinder 19 on the substrate 24 line.
  • the curve 26 corresponds to the curvature of a printed in the printing unit 12 of the forme cylinder 16 and the transfer cylinder 20 line.
  • the vertical distance between the curves 25 to 28 corresponds to the circumferential register deviation at the respective axial position of the printing material between the in the printing units 11 to 14 partial prints to be printed.
  • Fig. 3 shows a forme cylinder 15 or 16 or 17 or 18 of the invention- ⁇ en printing unit 10, which carries in the axial direction next to each other six formed as printing plates 29 printing forms, each of the printing plates 29 carries a printed image 30.
  • the position of the print images 30 on the printing plates 29 is identical throughout, but the printing plates 29 arranged side by side in the axial direction on a plate cylinder are offset relative to each other in their position on the respective forme cylinder in the circumferential direction.
  • the offset is determined according to the in Fig. 2 expected circumferential register deviation between the partial printing images to be printed in the individual printing units 11 to 14.
  • Fig. 4 shows an embodiment of the invention in which on a plate cylinder 15 or 16 or 17 or 18 in turn in the axial direction of the same six printing plates 31 are positioned side by side, each of the printing plates 31 in turn carries a printed image 32.
  • the pressure plates 32 on the printing plates 31 are circumferentially offset from one another in order to compensate the circumferential register deviations between the partial printing images to be printed in different printing units.
  • the printing plates 31 are exposed with printing images 32 staggered in the circumferential direction. This has the advantage that no constructive changes must be made to the plate clamping systems of the forme cylinder, so that the invention can also be used in existing printing units.
  • each printing plate can comprise more than one printed image, namely, when a plurality of printed pages are printed with a printing plate.
  • the invention can also be used in printing units are used, are arranged on the form of cylinders designed as Drucksleeves printing plates. Several print images for a plurality of print pages are then arranged on such print sleeves in the axial direction next to one another, wherein the print images are circumferentially offset from one another in order to compensate for the circumferential register deviations between the partial print images to be printed in the different print units.
  • the invention is therefore not limited to the use of printing plates designed as printing plates.

Description

Die Erfindung betrifft eine Druckeinheit einer Rollenrotationsdruckmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a printing unit of a web-fed rotary printing press according to the preamble of claim 1.

Druckeinheiten von Rollenrotationsdruckmaschinen, insbesondere von Zeitungsdruckmaschinen, verfügen über mehrere Druckwerke, wobei jedes Druckwerk aus einem Übertragungszylinder, einem Formzylinder und einem Farbwerk sowie gegebenenfalls einem Feuchtwerk besteht. Die Formzylinder werden auch als Plattenzylinder und die Übertragungszylinder als Gummizylinder bezeichnet. Weiterhin können solche Druckeinheiten Gegendruckzylinder aufweisen, wobei ein Gegendruckzylinder mit einem oder mehreren Übertragungszylindern unterschiedlicher Druckwerke zusammenwirken kann. Die Übertragungszylinder werden auch als Satellitenzylinder bezeichnet. Neben Druckeinheiten, die derartige Gegendruckzylinder aufweisen, sind auch Druckeinheiten bekannt, die keine Gegendruckzylinder aufweisen, wobei bei solchen Druckeinheiten ohne Gegendruckzylinder die Übertragungszylinder zweier Druckwerke aufeinander abrollen. Eine Rollenrotationsdruckeinheit mit mehreren Druckwerken umfasst demnach mehrere Formzylinder sowie mehrere Übertragungszylinder sowie gegebenenfalls einen oder mehrere Gegendruckzylinder. Die hier vorliegende Erfindung betrifft Druckeinheiten, die mehrere Formzylinder, mehrere Übertragungszylinder sowie zumindest einen Gegendruckzylinder aufweisen. Solche Druckeinheiten werden auch als Satellitendruckeinheiten bezeichnet. Satellitendruckeinheiten von Rollenrotationsdruckmaschinen verfügen üblicherweise über vier Druckwerke und demnach vier Formzylinder sowie vier Übertragungszylinder und einen oder zwei Gegendruckzylinder. Derartige Satellitendruckeinheiten mit vier Druckwerken und einem Gegendruckzylinder werden als 9-Zylinder-Druckeinheiten bezeichnet; Druckeinheiten mit vier Druckwerken und zwei Gegendruckzylindern werden hingegen als 10-Zylinder-Druckeinheiten bezeichnet.Printing units of web-fed rotary printing presses, in particular of newspaper printing presses, have a plurality of printing units, each printing unit consisting of a transfer cylinder, a forme cylinder and an inking unit and optionally a dampening unit. The form cylinder are also referred to as a plate cylinder and the transfer cylinder as a rubber cylinder. Furthermore, such printing units can have impression cylinders, wherein an impression cylinder can interact with one or more transfer cylinders of different printing units. The transfer cylinders are also referred to as satellite cylinders. In addition to printing units which have such counter-pressure cylinders, printing units are also known which do not have counter-pressure cylinders, with such printing units without counterpressure cylinders unrolling the transfer cylinders of two printing couples. A web-fed rotary printing unit having a plurality of printing units accordingly comprises a plurality of forme cylinders and a plurality of transfer cylinders and optionally one or more impression cylinders. The present invention relates to printing units having a plurality of forme cylinder, a plurality of transfer cylinders and at least one impression cylinder. Such printing units are also referred to as satellite printing units. Satellite printing units of web-fed rotary printing presses usually have four printing units and therefore four forme cylinders and four transfer cylinders and one or two impression cylinders. Such satellite printing units with four printing units and a counter-pressure cylinder are referred to as 9-cylinder printing units; Printing units with four printing units and two counter-pressure cylinders, however, are referred to as 10-cylinder printing units.

In einer solchen Satellitendruckeinheit werden im Bereich jedes Druckwerks Teildruckbilder für vorzugsweise mehrere Druckseiten in einer Druckfarbe auf einen zwischen den Übertragungszylindern und dem oder jedem Gegendruckzylinder hindurchbewegten Bedruckstoff aufgetragen. Hierzu muss in einer sogenannten Druck-An-Stellung der Druckeinheit einerseits zwischen den Formzylindern und den Übertragungszylindern der Druckwerke und andererseits zwischen den Übertragungszylindern und dem jeweiligen Gegendruckzylinder eine Pressung aufgebracht werden, wobei diese Pressung durch ein Einschwenken bzw. Anstellen der Übertragungszylinder an den jeweiligen Formzylinder sowie an den jeweiligen Gegendruckzylinder bereitgestellt wird. Die Übertragungszylinder sind hierzu üblicherweise exzentrisch gelagert und derart relativ zum jeweiligen Formzylinder sowie Gegendruckzylinder positioniert, dass ein Mittelpunkt der Übertragungszylinder nicht auf einer Verbindungslinie zwischen Mittelpunkten der entsprechenden Formzylinder sowie Gegendruckzylinder liegt. Vielmehr schließt eine Verbindungslinie eines Mittelpunkts eines Übertragungszylinders mit dem Mittelpunkt des entsprechenden Gegendruckzylinders mit der Verbindungslinie der Mittelpunkte der entsprechenden Formzylinder und Gegendruckzylinder einen Winkel zwischen 5° und 40° ein.In such a satellite printing unit, partial printing images are preferably applied in the region of each printing unit for preferably a plurality of printed pages in one printing ink to a printing material moved between the transfer cylinders and the or each impression cylinder. For this purpose, a pressure must be applied in a so-called pressure-on position of the printing unit on the one hand between the cylinders and the transfer cylinders of the printing units and on the other hand between the transfer cylinders and the respective impression cylinder, said pressing by pivoting or hiring the transfer cylinder to the respective form cylinder and provided to the respective impression cylinder. For this purpose, the transfer cylinders are usually mounted eccentrically and positioned relative to the respective forme cylinder and impression cylinder such that a center of the transfer cylinder is not located on a connecting line between centers of the corresponding forme cylinder and impression cylinder. Rather, a connecting line of a center of a transfer cylinder with the center of the corresponding counter-pressure cylinder with the line connecting the centers of the corresponding forme cylinder and counter-pressure cylinder forms an angle between 5 ° and 40 °.

Die Übertragungszylinder, die Formzylinder sowie der oder jeder Gegendruckzylinder solcher Druckeinheiten unterliegen aufgrund ihres Eigengewichts sowie aufgrund der Pressung bzw. Kontaktkräfte einer Durchbiegung. Diese Durchbiegung hängt insbesondere von der Gestalt der Zylinder ab, wobei relativ schlanke Zylinder einer stärkeren Durchbiegung unterliegen. Infolge der Durchbiegung der Übertragungszylinder sowie Formzylinder und Gegendruckzylinder kann sich zwischen den in den unterschiedlichen Druckwerken der Druckeinheit zu druckenden Teildruckbildern eine deutliche Umfangsregisterabweichung einstellen, welche die Druckqualität beeinträchtigt. Wie bereits erwähnt, sind diese Umfangsregisterabweichungen dann besonders stark ausgeprägt, wenn relativ schlanke Zylinder vorliegen.The transfer cylinder, the form cylinder and the or each impression cylinder such pressure units are subject to a deflection due to their own weight and due to the pressure or contact forces. This deflection depends in particular on the shape of the cylinder, with relatively slender cylinder undergo a greater deflection. As a result of the deflection of the transfer cylinder and the forme cylinder and counter-pressure cylinder, a clear circumferential register deviation can occur between the partial printing images to be printed in the different printing units of the printing unit, which adversely affects the print quality. As already mentioned, these circumferential register deviations are particularly pronounced when relatively slender cylinders are present.

Bei relativ schlanken Zylindern ist das Verhältnis von axial nebeneinander positionierten Druckseiten bzw. Druckbildern zu in Umfangsrichtung hintereinander positionierten Druckseiten bzw. Druckbildern groß, wie zum Beispiel bei 6/2-Zylindern, bei welchen in Axialrichtung sechs Druckseiten bzw. Druckbilder nebeneinander und in Umfangsrichtung jeweils zwei Druckseiten bzw. Druckbilder hintereinander positioniert ist. Gleiches gilt für 3/1-Zylinder, 4/1-Zylinder oder auch 6/1-Zylinder. Eine konventionelle Druckeinheit ist in EP-A-1314559 offenbart.In the case of relatively slender cylinders, the ratio of printed pages or printed images positioned axially one behind the other in the circumferential direction is large, for example in the case of 6/2 cylinders, in which six printed pages or printed images are arranged next to each other and in the circumferential direction in the axial direction two printed pages or printed images is positioned one behind the other. The same applies to 3/1 cylinder, 4/1 cylinder or 6/1 cylinder. A conventional printing unit is in EP-A-1314559 disclosed.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde, eine neuartige Druckeinheit einer Rollenrotationsdruckmaschine mit minimierten Umfangsregisterabweichungen zu schaffen.On this basis, the present invention is based on the problem to provide a novel printing unit of a web-fed rotary printing press with minimized circumferential register deviations.

Dieses Problem wird durch eine Druckeinheit einer Rollenrotationsdruckmaschine gemäß Anspruch 1 gelöst. Erfindungsgemäß trägt jeder Formzylinder jedes Druckwerks mindestens eine Druckform, derart, dass jeder Formzylinder in Axialrichtung nebeneinander mehrere Druckbilder trägt, über die entsprechende Teildruckbilder auf den Bedruckstoff aufgetragen werden, wobei die Anzahl der axial nebeneinander liegenden Druckbilder der Anzahl der axial nebeneinander auf den Bedruckstoff zu druckenden Druckseiten entspricht, und wobei im Bereich mindestens eines Formzylinders die in Axialrichtung des jeweiligen Formzylinders nebeneinander angeordneten Druckbilder in Umfangrichtung derart zueinander versetzt sind, dass Umfangsregisterabweichungen zwischen den in unterschiedlichen Druckwerken zu druckenden Teildruckbildern kompensierbar sind.This problem is solved by a printing unit of a web-fed rotary printing press according to claim 1. According to the invention, each form cylinder of each printing unit carries at least one printing form, such that each form cylinder in the axial direction next to each other several print images are applied over the corresponding partial printing images on the substrate, the number of axially juxtaposed images of the number of axially next to each other to be printed on the substrate Corresponds to printed pages, and wherein in the region of at least one forme cylinder in the axial direction of the respective form cylinder juxtaposed printed images are offset in the circumferential direction to each other such that circumferential register deviations between the to be printed in different printing units partial printing images are compensated.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1:
eine Druckeinheit einer Rollenrotationsdruckmaschine;
Fig. 2:
eine sich bei dem Druckwerk der Fig.1 einstellende Umfangsregisterabweichung;
Fig. 3:
eine schematisierte Ansicht auf einen Formzylinder einer erfindungsgemäße Druckeinheit nach einem ersten Ausführungsbeispiel der Erfindung; und
Fig. 4:
eine schematisierte Ansicht auf einen Formzylinder einer erfindungsgemäße Druckeinheit nach einem zweiten Ausführungsbeispiel der Erfindung.
Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Fig. 1:
a printing unit of a web-fed rotary printing press;
Fig. 2:
one in the printing of the Fig.1 adjusting circumferential register deviation;
3:
a schematic view of a forme cylinder of a printing unit according to the invention according to a first embodiment of the invention; and
4:
a schematic view of a forme cylinder of a printing unit according to the invention according to a second embodiment of the invention.

Nachfolgend wird die Erfindung unter Bezugnahme auf Fig. 1 bis 4 in größerem Detail beschrieben wird.Hereinafter, the invention with reference to Fig. 1 to 4 will be described in more detail.

Fig. 1 zeigt eine Druckeinheit 10 einer Rollenrotationsdruckmaschine, wobei die Druckeinheit 10 vier Druckwerke 11, 12, 13 und 14 und demnach vier Formzylinder 15, 16, 17 und 18 sowie vier Übertragungszylinder 19, 20, 21 und 22 umfasst. Neben den dargestellten Formzylindern 15 bis 18 sowie Übertragungszylindern 19 bis 22 verfügen die Druckwerke 11 bis 14 über nicht-dargestellte Farbwerke sowie gegebenenfalls Feuchtwerke. Bei der Druckeinheit 10 der Fig. 1 rollt jeder Formzylinder 15 bis 18 eines jeden Druckwerks 11 bis 14 auf dem jeweiligen Übertragungszylinder 19 bis 22 des entsprechenden Druckwerks 11 bis 14 ab, wobei alle Übertragungszylinder 19 bis 22 aller Druckwerke 11 bis 14 auf einem gemeinsamen Gegendruckzylinder 23 abrollen. Die Druckeinheit der Fig. 1 ist demnach als sogenannte 9-Zylinder-Druckeinheit ausgeführt. Fig. 1 shows a printing unit 10 of a web-fed rotary printing press, wherein the printing unit 10 four printing units 11, 12, 13 and 14 and therefore four forme cylinders 15, 16, 17 and 18 and four transfer cylinders 19, 20, 21 and 22 includes. In addition to the illustrated form cylinders 15 to 18 and transfer cylinders 19 to 22, the printing units 11 to 14 have not shown inking units and optionally dampening units. In the printing unit 10 of Fig. 1 Each form cylinder rolls 15 to 18 of each printing unit 11 to 14 on the respective transfer cylinder 19 to 22 of the corresponding printing unit 11 to 14, wherein all transfer cylinders 19 to 22 of all printing units 11 to 14 roll on a common impression cylinder 23. The printing unit of Fig. 1 is therefore designed as a so-called 9-cylinder printing unit.

Auf jedem der Formzylinder 15 bis 18 ist mindestens eine Druckform positioniert, derart, dass jeder Formzylinder 15 bis 18 in Axialrichtung nebeneinander sowie gegebenenfalls in Umfangsrichtung hintereinander mehrere Druckbilder trägt, um entsprechende Teildruckbilder auf einen Bedruckstoff 24 aufzutragen, wobei die Anzahl der axial nebeneinander liegenden Druckbilder der Anzahl der axial nebeneinander auf den Bedruckstoff 24 zu druckenden Druckseiten entspricht.At least one printing plate is positioned on each of the forme cylinders 15 to 18, such that each forme cylinder 15 to 18 carries several print images next to one another in the axial direction and optionally in circumferential direction to apply corresponding partial print images to a printing substrate 24, the number of axially juxtaposed print images the number of axially juxtaposed on the substrate 24 to be printed pages corresponds.

In der Druckeinheit 10 wird der bahnförmige Bedruckstoff 24 demnach im Bereich jedes Druckwerks 11 bis 14 mit Teildruckbildern in einer Druckfarbe für mehrere in Axialrichtung nebeneinander angeordnete sowie gegebenenfalls in Umfangsrichtung hintereinander angeordnete Druckseiten bedruckt, wobei gemäß Fig. 1 der Bedruckstoff 24 hierzu zwischen den Übertragungszylindern 19 bis 22 und dem Gegendruckzylinder 23 hindurchbewegt wird. Erste Teildruckbilder werden dabei im Bereich des Druckwerks 11 auf den Bedruckstoff 24 aufgetragen, weitere Teildruckbilder werden nacheinander in den Druckwerken 12, 13 und 14 auf den Bedruckstoff 24 gedruckt. Zur Erreichung einer möglichst hohen Druckqualität müssen insbesondere Umfangsregisterverschiebungen zwischen den in den unterschiedlichen Druckwerken zu druckenden Teildruckbildern minimiert werden, damit die Teildruckbilder in exakter Überdeckung auf den Bedruckstoff 24 gedruckt werden.In the printing unit 10, the web-shaped printing substrate 24 is therefore printed in the region of each printing unit 11 to 14 with partial printing images in a printing ink for a plurality of axially juxtaposed and possibly circumferentially successively arranged print pages, according to Fig. 1 the printing material 24 for this purpose is moved between the transfer cylinders 19 to 22 and the impression cylinder 23. First partial printed images are applied to the printing substrate 24 in the area of the printing unit 11, and further partial printed images are successively printed on the printing substrate 24 in the printing units 12, 13 and 14. In order to achieve the highest possible print quality, in particular, circumferential register displacements between the partial print images to be printed in the different printing units must be minimized so that the partial print images are printed on the printing substrate 24 in exact coverage.

Da die Formzylinder 15 bis 18, die Übertragungszylinder 19 bis 22 sowie der Gegendruckzylinder 23 in Folge ihres Eigengewichts sowie der beim Drucken auf dieselben wirkenden Kontaktkräfte einer Durchbiegung unterliegen, wird eine gerade, horizontale Linie auf den Formzylindern 15 bis 18 gekrümmt auf dem Bedruckstoff 24 abgebildet. Demnach ergeben sich bei der Druckeinheit 10 der Fig. 1 die in Fig. 2 dargestellten Umfangsregisterabweichungen zwischen den in den Druckwerken 11 bis 14 zu druckenden Teildruckbildern. In Fig. 2 ist auf der horizontal verlaufenden Achse die axiale Erstreckung der Zylinder bzw. die Breite der Bedruckstoffbahn und auf der vertikal verlaufenden Achse die Krümmung der von den Formzylindern 15 bis 18 übertragenen Linien relativ zur Transportrichtung des Bedruckstoffs 24 aufgetragen. Die Kurve 25 entspricht der Krümmung einer im Druckwerk 11 von dem Formzylinder 15 und über den Übertragungszylinder 19 auf den Bedruckstoff 24 gedruckten Linie. Die Kurve 26 entspricht der Krümmung einer im Druckwerk 12 von dem Formzylinder 16 und über den Übertragungszylinder 20 gedruckten Linie. Ebenso wird eine gerade, horizontale Linie auf dem Formzylinder 17 in Druckwerk 13 bei der Farbübertragung über den Übertragungszylinder 21 zur gekrümmten Kurve 27, und eine gerade, horizontale Linie auf dem Formzylinder 18 in Druckwerk 14 wird bei der Farbübertragung über den Übertragungszylinder 22 auf dem Bedruckstoff 24 zur gekrümmten Kurve 28. Der vertikale Abstand zwischen den Kurven 25 bis 28 entspricht der Umfangsregisterabweichung an der jeweiligen Axialposition des Bedruckstoffs zwischen den in den Druckwerken 11 bis 14 zu druckenden Teildruckbildern.Since the forme cylinders 15 to 18, the transfer cylinders 19 to 22 and the counter-pressure cylinder 23 are subject to deflection as a result of their own weight and the contact forces acting on them during printing, a straight, horizontal line on the forme cylinders 15 to 18 is curved on the printing substrate 24 , Accordingly, in the printing unit 10 of the Fig. 1 in the Fig. 2 illustrated circumferential register deviations between the partial printing images to be printed in the printing units 11 to 14. In Fig. 2 is on the horizontal axis extending the axial extent of the cylinder or the width of the printing substrate and on the vertical axis, the curvature of the transferred from the forme cylinders 15 to 18 lines relative to the transport direction of the printing material 24 applied. The curve 25 corresponds to the curvature of a printed in the printing unit 11 of the forme cylinder 15 and the transfer cylinder 19 on the substrate 24 line. The curve 26 corresponds to the curvature of a printed in the printing unit 12 of the forme cylinder 16 and the transfer cylinder 20 line. Also, a straight, horizontal line on the plate cylinder 17 in printing unit 13 in the color transfer via the transfer cylinder 21 to the curved curve 27, and a straight, horizontal line The vertical distance between the curves 25 to 28 corresponds to the circumferential register deviation at the respective axial position of the printing material between the in the printing units 11 to 14 partial prints to be printed.

Dabei sind insbesondere die Umfangsregisterabweichungen zwischen den Druckwerken, die der Bedruckstoff 24 in einer unterschiedlichen Transportrichtung durchläuft, besonders groß. So kann Fig. 1 entnommen werden, dass sich die Transportrichtung des Bedruckstoffs 24 zwischen den Druckwerken 12 und 13 ändert, weshalb die Umfangsregisterabweichungen zwischen den Druckwerken 11 und 13, 11 und 14, 12 und 13 sowie 12 und 14 größer ausfällt als die Umfangsregisterabweichungen zwischen Druckwerken 11 und 12 sowie 13 und 14.In particular, the circumferential register deviations between the printing units, which the printing material 24 passes through in a different transport direction, are particularly large. So can Fig. 1 can be taken that the transport direction of the printing material 24 between the printing units 12 and 13 changes, which is why the Umfangsregisterabweichungen between the printing units 11 and 13, 11 and 14, 12 and 13 and 12 and 14 fails greater than the Umfangsregisterabweichungen between printing units 11 and 12 and 13 and 14.

Zur Kompensation der Umfangsregisterabweichungen zwischen den in den unterschiedlichen Druckwerken 11 bis 14 zu druckenden Teildruckbildern wird im Sinne der hier vorliegenden Erfindung vorgeschlagen, die in Axialrichtung jedes Formzylinders 15 bis 18 nebeneinander angeordneten Druckbilder in Umfangsrichtung zueinander zu versetzen. Hierdurch können die Umfangsregisterabweichungen auf besonders einfache Art und Weise kompensiert werden.To compensate for the circumferential register deviations between the partial printing images to be printed in the different printing units 11 to 14, it is proposed in the sense of the present invention to displace the printing images arranged side by side in the circumferential direction relative to one another in the axial direction of each forme cylinder 15 to 18. As a result, the circumferential register deviations can be compensated in a particularly simple manner.

Fig. 3 zeigt einen Formzylinder 15 bzw. 16 bzw. 17 bzw. 18 der erfindungsgemä-βen Druckeinheit 10, der in Axialrichtung nebeneinander sechs als Druckplatten 29 ausgebildete Druckformen trägt, wobei jede der Druckplatten 29 ein Druckbild 30 trägt. Im Ausführungsbeispiel der Fig. 3 ist die Position der Druckbilder 30 auf den Druckplatten 29 durchgehend identisch, die in Axialrichtung auf einem Formzylinder nebeneinander angeordneten Druckplatten 29 sind jedoch in ihrer Position auf dem jeweiligen Formzylinder in Umfangsrichtung zueinander versetzt. Der Versatz bestimmt sich dabei nach der in Fig. 2 zu erwartenden Umfangsregisterabweichung zwischen den in den einzelnen Druckwerken 11 bis 14 zu druckenden Teildruckbildern. Fig. 3 shows a forme cylinder 15 or 16 or 17 or 18 of the invention-βen printing unit 10, which carries in the axial direction next to each other six formed as printing plates 29 printing forms, each of the printing plates 29 carries a printed image 30. In the embodiment of Fig. 3 the position of the print images 30 on the printing plates 29 is identical throughout, but the printing plates 29 arranged side by side in the axial direction on a plate cylinder are offset relative to each other in their position on the respective forme cylinder in the circumferential direction. The offset is determined according to the in Fig. 2 expected circumferential register deviation between the partial printing images to be printed in the individual printing units 11 to 14.

Fig. 4 zeigt ein Ausführungsbeispiel der Erfindung, in welchem auf einem Formzylinder 15 bzw. 16 bzw. 17 bzw. 18 wiederum in Axialrichtung desselben sechs Druckplatten 31 nebeneinander positioniert sind, wobei jede der Druckplatten 31 wiederum ein Druckbild 32 trägt. Im Ausführungsbeispiel der Fig. 4 weichen die axial nebeneinander auf einem Formzylinder positionierten Druckplatten 31 in ihrer Umfangsposition nicht voneinander ab, vielmehr sind zur Kompensation der Umfangsregisterabweichungen zwischen den in unterschiedlichen Druckwerken zu druckenden Teildruckbildern die Druckbilder 32 auf den Druckplatten 31 in Umfangsrichtung zueinander versetzt. Hierzu werden die Druckplatten 31 mit in Umfangsrichtung zueinander versetzten Druckbildern 32 belichtet. Dies hat den Vorteil, dass an den Plattenspannsystemen der Formzylinder keine konstruktiven Änderungen vorgenommen werden müssen, so dass die Erfindung auch bei bestehenden Druckeinheiten zum Einsatz kommen kann. Fig. 4 shows an embodiment of the invention in which on a plate cylinder 15 or 16 or 17 or 18 in turn in the axial direction of the same six printing plates 31 are positioned side by side, each of the printing plates 31 in turn carries a printed image 32. In the embodiment of Fig. 4 The pressure plates 32 on the printing plates 31 are circumferentially offset from one another in order to compensate the circumferential register deviations between the partial printing images to be printed in different printing units. For this purpose, the printing plates 31 are exposed with printing images 32 staggered in the circumferential direction. This has the advantage that no constructive changes must be made to the plate clamping systems of the forme cylinder, so that the invention can also be used in existing printing units.

Die in Fig. 3 und 4 dargestellte Anzahl von in Axialrichtung nebeneinander angeordneten Druckplatten bzw. Druckbildern ist rein exemplarisch. Ebenso können an jeder Axialposition mehrere Druckplatten in Umfangsrichtung hintereinander angeordnet sein, die dann in Umfangsrichtung im Sinne der hier vorliegenden Erfindung zueinander versetzt sind. Auch kann jede Druckplatte mehr als ein Druckbild umfassen, nämlich dann, wenn mit einer Druckplatte mehrere Druckseiten gedruckt werden.In the 3 and 4 shown number of axially juxtaposed printing plates or printed images is purely exemplary. Likewise, a plurality of pressure plates can be arranged in the circumferential direction one behind the other at each axial position, which are then offset from each other in the circumferential direction in the sense of the present invention. Also, each printing plate can comprise more than one printed image, namely, when a plurality of printed pages are printed with a printing plate.

Die Erfindung kann auch bei Druckeinheiten zum Einsatz kommen, auf deren Formzylindern als Drucksleeves ausgebildete Druckformen angeordnet sind. Auf solchen Drucksleeves sind dann in Axialrichtung nebeneinander mehrere Druckbilder für mehrere Druckseiten angeordnet, wobei die Druckbilder in Umfangsrichtung zueinander versetzt sind, um die Umfangsregisterabweichungen zwischen den in den unterschiedlichen Druckwerken zu druckenden Teildruckbildern zu kompensieren. Die Erfindung ist demnach nicht auf die Verwendung von als Druckplatten ausgebildeten Druckformen beschränkt.The invention can also be used in printing units are used, are arranged on the form of cylinders designed as Drucksleeves printing plates. Several print images for a plurality of print pages are then arranged on such print sleeves in the axial direction next to one another, wherein the print images are circumferentially offset from one another in order to compensate for the circumferential register deviations between the partial print images to be printed in the different print units. The invention is therefore not limited to the use of printing plates designed as printing plates.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Druckeinheitprinting unit
1111
Druckwerkprinting unit
1212
Druckwerkprinting unit
1313
Druckwerkprinting unit
1414
Druckwerkprinting unit
1515
Formzylinderform cylinder
1616
Formzylinderform cylinder
1717
Formzylinderform cylinder
1818
Formzylinderform cylinder
1919
Übertragungszylindertransfer cylinder
2020
Übertragungszylindertransfer cylinder
2121
Übertragungszylindertransfer cylinder
2222
Übertragungszylindertransfer cylinder
2323
GegendruckzylinderImpression cylinder
2424
Bedruckstoffsubstrate
2525
KurveCurve
2626
KurveCurve
2727
KurveCurve
2828
KurveCurve
2929
Druckplatteprinting plate
3030
Druckbildprint image
3131
Druckplatteprinting plate
3232
Druckbildprint image

Claims (7)

  1. A printing unit of a web-fed rotary printing machine, having a number of printing groups (11, 12, 13, 14), wherein each printing group comprises a forme cylinder (15, 16, 17, 18), a transfer cylinder (19, 20, 21, 22), an inking unit and also, optionally, a dampening unit, and having at least one counter-pressure cylinder (23) wherein, when the printing unit is in a print-on position, each forme cylinder (15, 16, 17, 18) of a printing group rolls on the transfer cylinder (19, 20, 21, 22) of the printing group in question and each transfer cylinder (19, 20, 21, 22) rolls on a counter-pressure cylinder (23) in order to apply partial printing images to a material (24) to be printed on which is moved through between the transfer cylinders (19, 20, 21, 22) and the counter-pressure cylinder (23) or each counter-pressure cylinder (23),
    characterised in that each forme cylinder (15, 16, 17, 18) of each printing group carries at least one printing forme (29, 31) in such a way that each forme cylinder (15, 16, 17, 18) carries, side by side in the axial direction, a number of printing images (30, 32) via which corresponding partial printing images are applied to the material (24) to be printed on, printing images (30, 32) that are disposed side by side in the axial direction of the forme cylinder (15, 16, 17, 18) in question being offset in the circumferential direction in the region of at least one forme cylinder (15, 16, 17, 18), the offset being determined in accordance with the deviations in circumferential register between the partial printing images to be printed in different printing groups.
  2. A printing unit according to claim 1, characterised in that a number of printing formes constructed as printing plates (29, 31) are disposed on each forme cylinder (15, 16, 17, 18), each printing plate (29, 31) carrying at least one printing image (30, 32).
  3. A printing unit according to claim 2, characterised in that the positions of the printing plates (29) that are disposed side by side in the axial direction of each forme cylinder (15, 16, 17, 18) are at least partially offset in relation to one another in the circumferential direction.
  4. A printing unit according to claim 2, characterised in that the positions of the printing images (32) of the printing plates (30) that are disposed side by side in the axial direction of each forme cylinder (15, 16, 17, 18) are at least partially offset in relation to one another in the circumferential direction.
  5. A printing unit according to claim 1, characterised in that a printing forme constructed as a printing sleeve is disposed on each forme cylinder (15, 16, 17, 18), the printing sleeve carrying a number of printing images side by side in the axial direction, the positions of the printing images which are disposed side by side in the axial direction being at least partially offset in relation to one another in the circumferential direction.
  6. A printing unit according to one or more of claims 1 to 5, characterised in that the said unit is constructed as a 9-cylinder printing unit with four forme cylinders (15, 16, 17, 18), four transfer cylinders (19, 20, 21, 22) and a single counter-pressure cylinder (23).
  7. A printing unit according to one of more of claims 1 to 5, characterised in that the said unit is constructed as a 10-cylinder printing unit with four forme cylinders (15, 16, 17, 18), four transfer cylinders (19, 20, 21, 22) and two counter-pressure cylinders (23).
EP06007161.0A 2005-04-13 2006-04-05 Printing unit of a rotary printing machine Not-in-force EP1712355B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005017181A DE102005017181A1 (en) 2005-04-13 2005-04-13 Printing unit of a web-fed rotary printing machine

Publications (3)

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EP1712355A1 EP1712355A1 (en) 2006-10-18
EP1712355B1 true EP1712355B1 (en) 2008-07-30
EP1712355B2 EP1712355B2 (en) 2014-12-17

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US (1) US7938064B2 (en)
EP (1) EP1712355B2 (en)
CA (1) CA2541942A1 (en)
DE (2) DE102005017181A1 (en)

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DE102007010358A1 (en) * 2007-03-03 2008-10-30 Manroland Ag Satellite printing unit of a web-fed printing machine
DE102013212917B4 (en) * 2013-07-03 2017-03-16 Koenig & Bauer Ag Form cylinder of a rotary printing press and printing unit

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EP1140497B1 (en) * 1998-12-30 2002-08-07 Koenig & Bauer Aktiengesellschaft Rotary press with a five-cylinder printing unit
US6253678B1 (en) † 1999-03-24 2001-07-03 R. R. Donnelley & Sons Method of printing to reduce misregistration
DE19961574A1 (en) * 1999-12-21 2001-07-19 Koenig & Bauer Ag Cylinder of a web-fed rotary printing press
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DE10249947A1 (en) * 2002-10-26 2004-05-13 Man Roland Druckmaschinen Ag Printing unit of a web-fed rotary printing press for newspaper printing
DE10321989B4 (en) * 2003-01-30 2005-10-06 Koenig & Bauer Ag press
US7631598B2 (en) † 2004-01-28 2009-12-15 Koenig & Bauer Aktiengesellschaft Printing machine with a device and a method for compensation of a longitudinal elongation and a transverse elongation of a printed web printed in differing printing couples
DE102005048619A1 (en) * 2004-10-11 2006-04-13 Koenig & Bauer Ag Printer unit, has form cylinder forming print position, where damping unit has moist application roller that has soft lining, and cylinders and rollers have breadth for printing of newspaper page at broad sheet size

Also Published As

Publication number Publication date
DE102005017181A1 (en) 2006-10-19
EP1712355B2 (en) 2014-12-17
US7938064B2 (en) 2011-05-10
DE502006001208D1 (en) 2008-09-11
US20060230954A1 (en) 2006-10-19
CA2541942A1 (en) 2006-10-13
EP1712355A1 (en) 2006-10-18

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